Optical realizations of quantum teleportation

Masanori Okada, Kan Takase, Maria Fuwa +4 more

Quantum teleportation is an important building block of quantum information processing. For practical applications, a quantum teleporter with the potential to include quantum error correction should be realized.

Zhangtc, Gohkw

Adam Miranowicz, Kiyoshi Tamaki

Recent experiments confirm that quantum teleportation is possible at least for states of photons and nuclear spins. The quantum teleportation is not only a curious effect but a fundamental protocol of quantum communication and quantum computing. The principles of the quantum teleportation and the entanglement swapping are explained, and physical realizations of teleportation of optical and atomic states are discussed.

Nicolás Brehm, Katrin Kroeger, Natascha Hedrich

Glen I. Harris, Warwick P. Bowen

Akira Furusawa, Jens Lykke Sørensen, Samuel L. Braunstein +3 more

Quantum teleportation of optical coherent states was demonstrated experimentally using squeezed-state entanglement. The quantum nature of the achieved teleportation was verified by the experimentally determined fidelity Fexp = 0.58 +/- 0.02, which describes the match between input and output states. A fidelity greater than 0.5 is not possible for coherent states without the use of entanglement. This is the first realization of unconditional quantum teleportation where every state entering the device is actually teleported.